He who would approach with an alert mind such a question as that of the historic actuality of the Gospel Jesus would do well to weigh a preliminary warning. Though after four hundred years of chronic scientific discovery all men are supposed to know the intellectual danger of a confident and foregone rejection of new theories, it is scarcely likely that the vogue of such error is at an end. After all, apart from the special experience in question, and from the general effect of the spread of "science," the average psychosis of men is not profoundly different from what it was in the two centuries which passed before the doctrines of Copernicus found general acceptance. Not many modern novelties of thought can so reasonably be met with derision as was the proposition that the earth moves round the sun. Let the ingenuous reader try to make the supposition that he had been brought up in ignorance of that truth, and without any training in astronomy, and that in adolescence or mature years it had been casually put to him as a non-authoritative suggestion. Would he have been quick to surmise that the paradox might be truth? Let him next try to imagine that he had been educated by an eccentric guardian in the Ptolemaic creed, which accounted so plausibly for so many solar and stellar phenomena, and that until middle life he had been kept unaware of the Copernican heresy.